Network Working Group M. Dubuc

Network Working Group M. Dubuc
Request for Comments: 4220 Consultant
Category: Standards Track T. Nadeau
Cisco Systems
J. Lang
Sonos, Inc.
November 2005

Traffic Engineering Link Management Information Base

Status of This Memo

This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (2005).

Abstract

This memo defines a portion of the Management Information Base (MIB)
for use with network management protocols in the Internet community.
In particular, it describes managed objects for modeling TE links as
described in the Link Bundling in MPLS Traffic Engineering (TE)
document.

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RFC 4220 MPLS TE Link MIB Module November 2005

Table of Contents

1. The Internet-Standard Management Framework ......................2
2. Introduction ....................................................3
3. Terminology .....................................................3
4. Feature Checklist ...............................................4
5. Outline .........................................................4
6. Brief Description of MIB Objects ................................4
6.1. teLinkTable ................................................4
6.2. teLinkDescriptorTable ......................................4
6.3. teLinkSrlgTable ............................................5
6.4. teLinkBandwidthTable .......................................5
6.5. componentLinkTable .........................................5
6.6. componentLinkDescriptorTable ...............................5
6.7. componentLinkBandwidthTable ................................5
7. Example of Bundled Link Setup ...................................5
8. Application of the Interfaces Group to TE Links .................9
8.1. Support of the TE Link Layer by ifTable ....................9
8.2. Using ifStackTable ........................................11
8.3. Applicability of ifRcvAddressTable ........................13
9. TE Link MIB Module Definitions .................................13
10. Security Considerations .......................................50
11. Contributors ..................................................51
12. Acknowledgements ..............................................51
13. IANA Considerations ...........................................51
13.1. IANA Considerations for the TE-LINK-STD-MIB .............51
14. References ....................................................51
14.1. Normative References ....................................51
14.2. Informative References ..................................52

1. The Internet-Standard Management Framework

For a detailed overview of the documents that describe the current
Internet-Standard Management Framework, please refer to section 7 of
RFC 3410 [RFC3410].

Managed objects are accessed via a virtual information store, termed
the Management Information Base or MIB. MIB objects are generally
accessed through the Simple Network Management Protocol (SNMP).
Objects in the MIB are defined using the mechanisms defined in the
Structure of Management Information (SMI). This memo specifies a MIB
module that is compliant to the SMIv2, which is described in STD 58,
RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580
[RFC2580].

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2. Introduction

OSPF [RFC3630], Generalized MPLS (GMPLS) [RFC3471], and the Link
Management Protocol (LMP) [RFC4204] use the concept of traffic
engineering (TE) links to abstract link properties. The effect of
this approach is a reduction in the amount of routing information
exchanged in the network, which improves routing scalability. In
addition, the use of TE links allows the implementation of new
capabilities such as link protection.

In this document, we present a MIB module that can be used to manage
TE links and their extension, the bundled link. This MIB module
enables both the configuration and the performance monitoring of TE
links and the bundled link.

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].

3. Terminology

This document uses terminology from the documents describing link
bundling [RFC4201] and GMPLS [RFC3945].

The link bundling feature is designed to aggregate one or more
similar entities between a node pair into a bundled link [RFC4201].
In RFC 4201, those entities are referred to as TE links. A TE link
is a subinterface capable of carrying MPLS traffic engineered
traffic. A TE Link may be comprised of only one underlying component
link. In cases where more than one component links are to be
combined, multiple component links should be created with differing
priorities to indicate hot-standby or parallel utilization.

A bundled link is another kind of Traffic Engineering (TE) link (see
[RFC4203]). A link bundle is a subinterface that binds the traffic
of a group of one or more TE links. There should be more than one TE
Link in a link bundle, but this is not a requirement. Furthermore,
if there are more than one TE links in a link bundle at some time,
and at some point later, all but one of the links are deleted, the
agent may choose to either delete the link bundle, or it may choose
to leave it intact. Traffic counters on a link bundle are cumulative
for all subinterfaces that it binds together.

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RFC 4220 MPLS TE Link MIB Module November 2005

4. Feature Checklist

The TE Link MIB module (TE-LINK-STD-MIB) is designed to satisfy the
following requirements and constraints:

- The MIB module supports the management of TE links, including
bundled links.

- Support is provided for configuration of traffic engineering
parameters associated with TE links.

- The MIB module is used to monitor the priority-based component
link and TE link bandwidth values.

5. Outline

Configuring bundled links involves the following steps:

- Creating a bundled link.

- Creating TE links.

- Optionally specifying the shared risk link groups associated with
the TE links.

- Configuring the component links including the bandwidth parameters
and associating the component links with the appropriate TE link.

- Associating the TE links with the appropriate bundled link.

6. Brief Description of MIB Objects

Sections 6.1 - 6.4 describe objects pertaining to TE links while
Sections 6.5 - 6.7 describe objects pertaining to component links.
The MIB objects were derived from the link bundling document
[RFC4201].

6.1. teLinkTable

This table represents the TE links, including bundled links, and
their generic traffic engineering parameters.

6.2. teLinkDescriptorTable

This table represents the TE link interface switching capability
descriptors.

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6.3. teLinkSrlgTable

This table represents the shared risk link groups (SRLGs) associated
with TE links.

6.4. teLinkBandwidthTable

This table specifies the priority-based bandwidth traffic engineering
parameters associated with TE links.

6.5. componentLinkTable

This table enumerates the component links and their generic traffic
engineering parameters.

6.6. componentLinkDescriptorTable

This table enumerates the interface switching capability descriptors
that each component link supports.

6.7. componentLinkBandwidthTable

The component link bandwidth table specifies the priority-based
bandwidth values associated with the component links.

Component links that belong to the same TE link must be compatible.
If these two tables are managed independently, mechanisms should be
put in place to ensure consistency between the two tables. TE links
that form a bundled link must have compatible traffic engineering
parameters (resource class, link metric, and protection type).

The link descriptors of the teLinkDescriptorTable can be derived from
the link descriptors of the componentLinkDescrTable.

Some of the bandwidth parameters of the teLinkTable,
teLinkDescriptorTable, teLinkBandwidthTable are derived from the
bandwidth parameters of the componentLinkTable,
componentLinkDescriptorTable, and componentLinkBandwidthTable
(maximum reservable bandwidth, minimum LSP bandwidth, maximum LSP
bandwidth at specified priority, and unreserved bandwidth).

7. Example of Bundled Link Setup

In this section, we provide a brief example of using the MIB objects
described in section 10 to set up a bundled link. While this example
is not meant to illustrate every nuance of the MIB module, it is
intended as an aid to understanding some of the key concepts. It is
meant to be read after going through the MIB module itself. Section

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8.2 provides more details on the use of the ifStackTable to establish
relationships between bundled links, TE links, and component links.

Suppose that one would like to manually create a bundled link out of
two 1:1 TE links, as depicted in the figure in Section 8.2. Assume
that the bundled link is associated with SRLGs 10 and 50. Finally,
let the component links be port entity interfaces (lambdas). The
following example illustrates which rows and corresponding objects
might be created to accomplish this.

First, a bundled link entry is created. An ifEntry with the same
ifIndex and with ifType teLink needs to be created beforehand.

In teLinkTable:
{
ifIndex = 2,
teLinkAddressType = unknown(0),
teLinkLocalIpAddr = ''H,
teLinkRemoteIpAddr = ''H,
teLinkMetric = 5,
teLinkProtectionType = dedicated1For1(4),
teLinkWorkingPriority = 7,
teLinkResourceClass = 3,
teLinkIncomingIfId = 0,
teLinkOutgoingIfId = 2,
teLinkRowStatus = createAndGo(4),
teLinkStorageType = nonVolatile(3)
}

In ifStackTable:
{
ifStackHigherLayer = 0,
ifStackLowerLayer = 2,
ifStackStatus = createAndGo(4)
}

Next, the two TE links are created.

In teLinkTable:
{
ifIndex = 3,
teLinkAddressType = unknown(0),
teLinkLocalIpAddr = ''H,
teLinkRemoteIpAddr = ''H,
teLinkMetric = 5,
teLinkProtectionType = unprotected(2),
teLinkWorkingPriority = 7,
teLinkResourceClass = 3,

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teLinkIncomingIfId = 0,
teLinkOutgoingIfId = 3,
teLinkRowStatus = createAndGo(4),
teLinkStorageType = nonVolatile(3)
}

In ifStackTable:
{
ifStackHigherLayer = 2,
ifStackLowerLayer = 3,
ifStackStatus = createAndGo(4)
}

In teLinkTable:
{
ifIndex = 4,
teLinkAddressType = unknown(0),
teLinkLocalIpAddr = ''H,
teLinkRemoteIpAddr = ''H,
teLinkMetric = 5,
teLinkProtectionType = unprotected(2),
teLinkWorkingPriority = 7,
teLinkResourceClass = 3,
teLinkIncomingIfId = 0,
teLinkOutgoingIfId = 4,
teLinkRowStatus = createAndGo(4),
teLinkStorageType = nonVolatile(3)
}

In ifStackTable:
{
ifStackHigherLayer = 2,
ifStackLowerLayer = 4,
ifStackStatus = createAndGo(4)
}

We assign SRLGs to the TE links.

In the teLinkSrlgTable:
{
ifIndex = 3,
teLinkSrlg = 10,
teLinkSrlgRowStatus = createAndGo(4),
teLinkSrlgStorageType = nonVolatile(3)
}

In the teLinkSrlgTable:
{

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ifIndex = 4,
teLinkSrlg = 50,
teLinkSrlgRowStatus = createAndGo(4),
teLinkSrlgStorageType = nonVolatile(3)
}

The bundled link inherits the SRLG properties from the associated TE
links.

Next, for each unbundled TE link, a component link is created. An
ifEntry with the same ifIndex needs to be created beforehand.

In componentLinkTable:
{
ifIndex = 5,
componentLinkPreferredProtection = primary(1),
componentLinkRowStatus = createAndGo(4),
componentLinkStorageType = nonVolatile(3)
}

In ifStackTable:
{
ifStackHigherLayer = 3,
ifStackLowerLayer = 5,
ifStackStatus = createAndGo(4)
}

In componentLinkTable:
{
ifIndex = 6,
componentLinkPreferredProtection = secondary(2),
componentLinkRowStatus = createAndGo(4)
componentLinkStorageType = nonVolatile(3)
}

In ifStackTable:
{
ifStackHigherLayer = 4,
ifStackLowerLayer = 6,
ifStackStatus = createAndGo(4)
}

In this example, once a component link is added to the
componentLinkTable, the associated link descriptors are implicitly
added to the componentLinkDescriptorTable.

TE link link descriptors are derived from their component link
descriptors.

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Note that the bandwidth attributes in teLinkDescriptorTable,
componentLinkDescriptorTable, teLinkBandwidthTable, and
componentLinkBandwidthTable are maintained by the device according to
LSP creation/deletion at different priorities. The values in the
teLinkBandwidthTable are an aggregation of the values for the
component links of the TE links and the TE links of the bundled link.

8. Application of the Interfaces Group to TE Links

The Interfaces Group [RFC2863] defines generic managed objects for
managing interfaces. This memo contains the media-specific
extensions to the Interfaces Group for managing TE Link interfaces as
logical interfaces.

This memo assumes the interpretation of the Interfaces Group to be in
accordance with [RFC2863], which states that the interfaces table
(ifTable) contains information on the managed resource's interfaces
and that each sub-layer below the internetwork layer of a network
interface is considered an interface. Thus, the TE Link interface is
represented as an entry in the ifTable. The interrelation of entries
in the ifTable is defined by Interfaces Stack Group, as defined in
[RFC2863].

When using TE Link interfaces, the interface stack table might appear
as follows:

+----------------------------------------+
| TE link-interface ifType = teLink(200) +
+----------------------------------------+
| Underlying Layer... +
+----------------------------------------+

In the above diagram, "Underlying Layer..." refers to the ifIndex of
any interface type, which has been defined for TE Link interworking.
Examples include ATM, Frame Relay, Ethernet, etc.

8.1. Support of the TE Link Layer by ifTable

Some specific interpretations of ifTable for the TE Link layer
follow.

Object Use for the TE Link layer

ifIndex Each TE Link interface is represented by an ifEntry.

ifDescr Description of the TE Link interface.

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ifType The value that is allocated for TE Link is 200
[IANAifType].

ifSpeed The total bandwidth in bits per second for use by the
TE Link layer.

ifPhysAddress Unused.

ifAdminStatus This variable indicates the administrator's intent as
to whether TE Link should be enabled, disabled, or
running in some diagnostic testing mode on this
interface. Also see [RFC2863].

ifOperStatus This value reflects the actual or operational status of
the TE Link on this interface.

ifLastChange See [RFC2863].

ifInOctets The number of received octets over the interface, i.e.,
the number of received octets in all component links
associated with the interface.

ifOutOctets The number of transmitted octets over the interface,
i.e., the number of octets transmitted over all
component links associated with the interface.

ifInErrors The number of packets dropped due to uncorrectable
errors.

ifInUnknownProtos
The number of received packets discarded during packet
header validation.

ifOutErrors See [RFC2863].

ifName Textual name (unique on this system) of the interface,
or an octet string of zero length.

ifLinkUpDownTrapEnable
Default is disabled (2).

ifConnectorPresent
Set to false (2).

ifHighSpeed See [RFC2863].

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ifHCInOctets The 64-bit version of ifInOctets; supported if required
by the compliance statements in [RFC2863].

ifHCOutOctets The 64-bit version of ifOutOctets; supported if
required by the compliance statements in [RFC2863].

ifAlias The non-volatile 'alias' name for the interface, as
specified by a network manager.

ifCounterDiscontinuityTime
See [RFC2863].

Support for ifInOctets, ifOutOctets, ifInErrors, ifInUnknownProtos,
ifOutErrors, ifHCInOctets, and ifHCOutOctets objects is not required
if the encoding type is clear. For other encoding types, traffic
counters on a TE link are cumulative for all subinterfaces that it
binds together.

8.2. Using ifStackTable

This section describes, by example, how to use the ifStackTable to
represent the relationship of TE links with underlying TE-enabled
interfaces. Implementors of the stack table for TE link interfaces
should look at the appropriate RFC for the service being stacked on
TE links. The examples given below are for illustration purposes
only.

Example: MPLS is being carried on a bundled TE link. The bundled
TE link represents a 1:1 optical transport interface.

In this example, the component link is a TE link. The two component
links/TE links are grouped in a bundled link.

+-------------------------------------------------------------------+
| MPLS interface ifType = mpls(166) |
| ifIndex = 1 |
+-------------------------------------------------------------------+
| TE link (bundled link) ifType = teLink(200) |
| ifIndex = 2 |
+--------------------------------+-+--------------------------------+
| TE link ifType = teLink(200) | | TE link ifType = teLink(200) |
| ifIndex = 3 | | ifIndex = 4 |
+--------------------------------+ +--------------------------------+
| Component link | | Component link |
| ifType = opticalTransport(196) | | ifType = opticalTransport(196) |
| ifIndex = 5 | | ifIndex = 6 |
+--------------------------------+ +--------------------------------+

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The assignment of the index values could, for example, be:

ifIndex Description
1 mpls (type 166)
2 teLink (type 200)
3 teLink (type 200)
4 teLink (type 200)
5 opticalTransport (type 196)
6 opticalTransport (type 196)

The ifStackTable is then used to show the relationships between the
various interfaces.

ifStackTable Entries

HigherLayer LowerLayer
0 1
1 2
2 3
2 4
3 5
4 6
5 0
6 0

In the case where MPLS is using a single TE link, then the upper TE
link layer (link bundle) is not required.

+-----------------------------------+
| MPLS interface ifType = mpls(166) |
+-----------------------------------+
| TE link ifType = teLink(200) |
+-----------------------------------+
| Component link |
| ifType = opticalTransport(196) |
+-----------------------------------+

The assignment of the index values could for example be:

ifIndex Description
1 mpls (type 166)
2 teLink (type 200)
3 opticalTransport (type 196)

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RFC 4220 MPLS TE Link MIB Module November 2005

The ifStackTable is then used to show the relationships between the
various interfaces.

ifStackTable Entries

HigherLayer LowerLayer
0 1
1 2
2 3
3 0

8.3. Applicability of ifRcvAddressTable

TE link interfaces are logical interfaces with no media-level
addresses. As such, the ifRcvAddressTable is not applicable to these
interfaces.

9. TE Link MIB Module Definitions

TE-LINK-STD-MIB DEFINITIONS ::= BEGIN

IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, transmission, Integer32, Unsigned32
FROM SNMPv2-SMI

MODULE-COMPLIANCE, OBJECT-GROUP
FROM SNMPv2-CONF

TEXTUAL-CONVENTION, RowStatus, StorageType
FROM SNMPv2-TC

InterfaceIndexOrZero, ifIndex
FROM IF-MIB

InetAddressType, InetAddress
FROM INET-ADDRESS-MIB;

teLinkStdMIB MODULE-IDENTITY
LAST-UPDATED "200510110000Z" -- 11 October 2005
ORGANIZATION "Multiprotocol Label Switching (MPLS) Working Group"
CONTACT-INFO
" Martin Dubuc
Email: [email protected]

Thomas D. Nadeau
Email: [email protected]

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RFC 4220 MPLS TE Link MIB Module November 2005

Jonathan P. Lang
Email: [email protected]

Comments about this document should be emailed directly to
the MPLS working group mailing list at [email protected]."

DESCRIPTION
"Copyright (C) 2005 The Internet Society. This version of
this MIB module is part of RFC 4220; see the RFC
itself for full legal notices.

This MIB module contains managed object definitions for
MPLS traffic engineering links as defined in
'Link Bundling in MPLS Traffic Engineering (TE)'."

-- Revision history.
REVISION
"200510110000Z" -- 11 October 2005
DESCRIPTION
"Initial version published as RFC 4220."
::= { transmission 200 }

-- Textual Conventions

TeLinkBandwidth ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"This type is used to represent link bandwidth in bps. This
value is represented using a 4 octet IEEE floating point
format [IEEE]. The floating point representation is not
used to represent fractional value but rather to allow
specification of large numbers that cannot be expressed
with 32-bit integers."
REFERENCE
"IEEE Standard for Binary Floating-Point Arithmetic,
Standard 754-1985"
SYNTAX OCTET STRING (SIZE(4))

TeLinkPriority ::= TEXTUAL-CONVENTION
DISPLAY-HINT "d"
STATUS current
DESCRIPTION
"This type is used to represent a priority. Each connection
is assigned a priority. This priority is used when
accounting for bandwidth on TE links or component
links, for resource allocation and for rerouting purposes.
Value 0 is the highest priority. Value 7 is the lowest
priority."

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SYNTAX Unsigned32 (0..7)

TeLinkProtection ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"Link protection."
SYNTAX INTEGER {
primary(1),
secondary(2)
}

TeLinkSwitchingCapability ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"Switching capability as specified in the 'OSPF Extensions in
Support of Generalized Multi-Protocol Label Switching
(GMPLS)' document. The values specified in this document
are not contiguous."
SYNTAX INTEGER {
packetSwitch1(1),
packetSwitch2(2),
packetSwitch3(3),
packetSwitch4(4),
layer2Switch(51),
tdm(100),
lambdaSwitch(150),
fiberSwitch(200)
}

TeLinkEncodingType ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"Link encoding type as specified in 'Generalized
Multi-Protocol Label Switching (GMPLS) Signaling
Functional Description' document. The values
specified in this document are not contiguous."
SYNTAX INTEGER {
packet(1),
ethernet(2),
ansiEtsiPdh(3),
sdhItuSonetAnsi(5),
digitalWrapper(7),
lambda(8),
fiber(9),
fiberChannel(11)
}

TeLinkSonetSdhIndication ::= TEXTUAL-CONVENTION

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RFC 4220 MPLS TE Link MIB Module November 2005

STATUS current
DESCRIPTION
"This convention is used to indicate whether the interface
supports Standard or Arbitrary SONET/SDH. To simplify the
mapping process, the values used in this textual convention
match the values specified in the interface switching
capability specific information field, i.e., 0 for Standard
SONET/SDH and 1 for Arbitrary SONET/SDH."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
SYNTAX INTEGER {
standard(0),
arbitrary(1)
}

-- Top level components of this MIB module

-- Notifications
teLinkNotifications OBJECT IDENTIFIER ::= { teLinkStdMIB 0 }
-- Tables, Scalars
teLinkObjects OBJECT IDENTIFIER ::= { teLinkStdMIB 1 }
-- Conformance
teLinkConformance OBJECT IDENTIFIER ::= { teLinkStdMIB 2 }

-- TE Link Table

teLinkTable OBJECT-TYPE
SYNTAX SEQUENCE OF TeLinkEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table specifies the grouping of component links into
TE links and the grouping of TE links into bundled links."
::= { teLinkObjects 1 }

teLinkEntry OBJECT-TYPE
SYNTAX TeLinkEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in this table exists for each ifEntry with an
ifType of teLink(200), i.e., for every TE link. An ifEntry
in the ifTable must exist before a teLinkEntry is created
with the corresponding ifIndex. If a TE link entry in the
ifTable is destroyed, then so is the corresponding entry
in the teLinkTable. The administrative and operational
status values are controlled from the ifEntry."

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RFC 4220 MPLS TE Link MIB Module November 2005

INDEX { ifIndex }
::= { teLinkTable 1 }

TeLinkEntry ::= SEQUENCE {
teLinkAddressType InetAddressType,
teLinkLocalIpAddr InetAddress,
teLinkRemoteIpAddr InetAddress,
teLinkMetric Unsigned32,
teLinkMaximumReservableBandwidth TeLinkBandwidth,
teLinkProtectionType INTEGER,
teLinkWorkingPriority TeLinkPriority,
teLinkResourceClass Unsigned32,
teLinkIncomingIfId Integer32,
teLinkOutgoingIfId InterfaceIndexOrZero,
teLinkRowStatus RowStatus,
teLinkStorageType StorageType
}

teLinkAddressType OBJECT-TYPE
SYNTAX InetAddressType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The type of Internet address for the TE link."
::= { teLinkEntry 1 }

teLinkLocalIpAddr OBJECT-TYPE
SYNTAX InetAddress
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The local Internet address for numbered links. The type of
this address is determined by the value of the
teLinkAddressType object.

For IPv4 and IPv6 numbered links, this object represents the
local IP address associated with the TE link. For an
unnumbered link, the local address is of type unknown, this
object is set to the zero length string, and the
teLinkOutgoingIfId object then identifies the unnumbered
address.

If the TE link is a Forwarding Adjacency (FA), the local
IP address is set to the head-end address of the FA-LSP.

If ipAddrTable is implemented, this object must have the
same value as the ipAdEntAddr object that belongs to the
row in ipAddrTable where ipAdEntIfIndex is equal to

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RFC 4220 MPLS TE Link MIB Module November 2005

ifIndex."
::= { teLinkEntry 2 }

teLinkRemoteIpAddr OBJECT-TYPE
SYNTAX InetAddress
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The remote Internet address for numbered links. The type of
this address is determined by the value of the
teLinkAddressType object.

The remote IP address associated with the TE link (IPv4 and
IPv6 numbered links). For an unnumbered link, the remote
address is of type unknown, this object is set to the
zero length string, and the teLinkIncomingIfId object then
identifies the unnumbered address.

If the TE link is a Forwarding Adjacency, the remote IP
address is set to the tail-end address of the FA-LSP."
::= { teLinkEntry 3 }

teLinkMetric OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The traffic engineering metric for the TE link is
derived from its component links. All component links
within the TE link must have the same traffic
engineering metric."
REFERENCE
"Link Bundling in MPLS Traffic Engineering (TE), RFC 4201"
::= { teLinkEntry 4 }

teLinkMaximumReservableBandwidth OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This attribute specifies the maximum reservable bandwidth on
the TE link. This is the union of the maximum reservable
bandwidth of all the component links within the
TE link that can be used to carry live traffic."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"

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::= { teLinkEntry 5 }

teLinkProtectionType OBJECT-TYPE
SYNTAX INTEGER {
extraTraffic(1),
unprotected(2),
shared(3),
dedicated1For1(4),
dedicated1Plus1(5),
enhanced(6)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the link protection type of the
TE link. Descriptions of the different protection types can
be found in the 'Routing Extensions in Support of
Generalized Multi-Protocol Label Switching (GMPLS)'
document."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203 and
Routing Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4202"
::= { teLinkEntry 6 }

teLinkWorkingPriority OBJECT-TYPE
SYNTAX TeLinkPriority
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object represents a priority value such that a new
connection with a higher priority, i.e., numerically lower
than this value, is guaranteed to be setup on a primary
link and not on a secondary link."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { teLinkEntry 7 }

teLinkResourceClass OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the TE link resource class.
The resource class is a 32 bit bitfield. The resource class
for a link bundle is derived from the resource class of its

Dubuc, et al. Standards Track [Page 19]

RFC 4220 MPLS TE Link MIB Module November 2005

TE links. All TE links within a link bundle must have the
same resource class. Encoding of the resource class is
described in the 'Traffic Engineering (TE) Extensions to
OSPF Version 2' document."
REFERENCE
"Link Bundling in MPLS Traffic Engineering (TE), RFC 4201
and Traffic Engineering (TE) Extensions to OSPF Version 2,
RFC 3630"
::= { teLinkEntry 8 }

teLinkIncomingIfId OBJECT-TYPE
SYNTAX Integer32 (0..2147483647)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"For unnumbered links, the incoming interface is set to the
outgoing interface identifier chosen by the neighboring LSR
for the reverse link corresponding to this TE link. If the
link is numbered, the value of this object is 0 and the
address is stored in the teLinkRemoteIpAddr instead."
REFERENCE
"Link Bundling in MPLS Traffic Engineering (TE), RFC 4201"
::= { teLinkEntry 9 }

teLinkOutgoingIfId OBJECT-TYPE
SYNTAX InterfaceIndexOrZero
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"If the link is unnumbered, the outgoing interface identifier
is set to the outgoing interface identifier chosen for the
TE link by the advertising LSR. If the link is numbered, the
value of this object is 0 and the address is stored in the
teLinkLocalIpAddr instead."
REFERENCE
"Link Bundling in MPLS Traffic Engineering (TE), RFC 4201"
::= { teLinkEntry 10 }

teLinkRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable is used to create, modify, and/or
delete a row in this table. None of the writable objects in
a row can be changed if status is active(1)."
::= { teLinkEntry 11 }

Dubuc, et al. Standards Track [Page 20]

RFC 4220 MPLS TE Link MIB Module November 2005

teLinkStorageType OBJECT-TYPE
SYNTAX StorageType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The storage type for this conceptual row in the
teLinkTable. Conceptual rows having the value
'permanent' need not allow write-access to any
columnar object in the row."
::= { teLinkEntry 12 }

-- End of teLinkTable

-- TE Link Descriptor Table

teLinkDescriptorTable OBJECT-TYPE
SYNTAX SEQUENCE OF TeLinkDescriptorEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table specifies the interface switching capability
descriptors associated with the TE links."
::= { teLinkObjects 2 }

teLinkDescriptorEntry OBJECT-TYPE
SYNTAX TeLinkDescriptorEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in this table is created for every TE link interface
switching capability descriptor. An ifEntry in the ifTable
must exist before a teLinkDescriptorEntry using the same
ifIndex is created. ifType of ifEntry must be teLink(200).
If a TE link entry in the ifTable is destroyed, then so are
all of the entries in the teLinkDescriptorTable that use the
ifIndex of this TE link."
INDEX { ifIndex, teLinkDescriptorId }
::= { teLinkDescriptorTable 1 }

TeLinkDescriptorEntry ::= SEQUENCE {
teLinkDescriptorId Unsigned32,
teLinkDescrSwitchingCapability TeLinkSwitchingCapability,
teLinkDescrEncodingType TeLinkEncodingType,
teLinkDescrMinLspBandwidth TeLinkBandwidth,
teLinkDescrMaxLspBandwidthPrio0 TeLinkBandwidth,
teLinkDescrMaxLspBandwidthPrio1 TeLinkBandwidth,
teLinkDescrMaxLspBandwidthPrio2 TeLinkBandwidth,

Dubuc, et al. Standards Track [Page 21]

RFC 4220 MPLS TE Link MIB Module November 2005

teLinkDescrMaxLspBandwidthPrio3 TeLinkBandwidth,
teLinkDescrMaxLspBandwidthPrio4 TeLinkBandwidth,
teLinkDescrMaxLspBandwidthPrio5 TeLinkBandwidth,
teLinkDescrMaxLspBandwidthPrio6 TeLinkBandwidth,
teLinkDescrMaxLspBandwidthPrio7 TeLinkBandwidth,
teLinkDescrInterfaceMtu Unsigned32,
teLinkDescrIndication TeLinkSonetSdhIndication,
teLinkDescrRowStatus RowStatus,
teLinkDescrStorageType StorageType
}

teLinkDescriptorId OBJECT-TYPE
SYNTAX Unsigned32 (1..4294967295)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This object specifies the link descriptor identifier."
::= { teLinkDescriptorEntry 1 }

teLinkDescrSwitchingCapability OBJECT-TYPE
SYNTAX TeLinkSwitchingCapability
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies interface switching capability of
the TE link, which is derived from its component links."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { teLinkDescriptorEntry 2 }

teLinkDescrEncodingType OBJECT-TYPE
SYNTAX TeLinkEncodingType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the TE link encoding type."
REFERENCE
"Generalized Multi-Protocol Label Switching (GMPLS)
Signaling Functional Description, RFC 3471"
::= { teLinkDescriptorEntry 3 }

teLinkDescrMinLspBandwidth OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-create
STATUS current
DESCRIPTION

Dubuc, et al. Standards Track [Page 22]

RFC 4220 MPLS TE Link MIB Module November 2005

"This attribute specifies the minimum LSP bandwidth on
the TE link. This is derived from the union of the
minimum LSP bandwidth of all the component links
associated with the TE link that can be used to carry
live traffic."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { teLinkDescriptorEntry 4 }

teLinkDescrMaxLspBandwidthPrio0 OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the maximum LSP bandwidth at
priority 0 on the TE link. This is the union of the maximum
LSP bandwidth at priority 0 of all the component links within
the TE link that can be used to carry live traffic."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { teLinkDescriptorEntry 5 }

teLinkDescrMaxLspBandwidthPrio1 OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the maximum LSP bandwidth at
priority 1 on the TE link. This is the union of the maximum
LSP bandwidth at priority 1 of all the component links within
the TE link that can be used to carry live traffic."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { teLinkDescriptorEntry 6 }

teLinkDescrMaxLspBandwidthPrio2 OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the maximum LSP bandwidth at
priority 2 on the TE link. This is the union of the maximum

Dubuc, et al. Standards Track [Page 23]

RFC 4220 MPLS TE Link MIB Module November 2005

LSP bandwidth at priority 2 of all the component links within
the TE link that can be used to carry live traffic."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { teLinkDescriptorEntry 7 }

teLinkDescrMaxLspBandwidthPrio3 OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the maximum LSP bandwidth at
priority 3 on the TE link. This is the union of the maximum
LSP bandwidth at priority 3 of all the component links within
the TE link that can be used to carry live traffic."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { teLinkDescriptorEntry 8 }

teLinkDescrMaxLspBandwidthPrio4 OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the maximum LSP bandwidth at
priority 4 on the TE link. This is the union of the maximum
LSP bandwidth at priority 4 of all the component links within
the TE link that can be used to carry live traffic."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { teLinkDescriptorEntry 9 }

teLinkDescrMaxLspBandwidthPrio5 OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the maximum LSP bandwidth at
priority 5 on the TE link. This is the union of the maximum
LSP bandwidth at priority 5 of all the component links within
the TE link that can be used to carry live traffic."
REFERENCE

Dubuc, et al. Standards Track [Page 24]

RFC 4220 MPLS TE Link MIB Module November 2005

"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { teLinkDescriptorEntry 10 }

teLinkDescrMaxLspBandwidthPrio6 OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the maximum LSP bandwidth at
priority 6 on the TE link. This is the union of the maximum
LSP bandwidth at priority 6 of all the component links within
the TE link that can be used to carry live traffic."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { teLinkDescriptorEntry 11 }

teLinkDescrMaxLspBandwidthPrio7 OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the maximum LSP bandwidth at
priority 7 on the TE link. This is the union of the maximum
LSP bandwidth at priority 7 of all the component links within
the TE link that can be used to carry live traffic."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { teLinkDescriptorEntry 12 }

teLinkDescrInterfaceMtu OBJECT-TYPE
SYNTAX Unsigned32 (1..65535)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the interface MTU for the TE
link descriptor."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { teLinkDescriptorEntry 13 }

teLinkDescrIndication OBJECT-TYPE
SYNTAX TeLinkSonetSdhIndication

Dubuc, et al. Standards Track [Page 25]

RFC 4220 MPLS TE Link MIB Module November 2005

MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies whether this interface supports
Standard or Arbitrary SONET/SDH."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { teLinkDescriptorEntry 14 }

teLinkDescrRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable is used to create, modify, and/or
delete a row in this table. No read-create object
can be changed if teLinkDescrRowStatus is in the active(1)
state."
::= { teLinkDescriptorEntry 15 }

teLinkDescrStorageType OBJECT-TYPE
SYNTAX StorageType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The storage type for this conceptual row in the
teLinkDescriptorTable. Conceptual rows having the value
'permanent' need not allow write-access to any
columnar object in the row."
::= { teLinkDescriptorEntry 16 }

-- End of teLinkDescriptorTable

-- TE Link Shared Risk Link Group Table

teLinkSrlgTable OBJECT-TYPE
SYNTAX SEQUENCE OF TeLinkSrlgEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table specifies the SRLGs associated with TE links."
::= { teLinkObjects 3 }

teLinkSrlgEntry OBJECT-TYPE
SYNTAX TeLinkSrlgEntry
MAX-ACCESS not-accessible

Dubuc, et al. Standards Track [Page 26]

RFC 4220 MPLS TE Link MIB Module November 2005

STATUS current
DESCRIPTION
"An entry in this table contains information about an
SRLG associated with a TE link.
An ifEntry in the ifTable must exist before a
teLinkSrlgEntry using the same ifIndex is created.
The ifType of ifEntry must be teLink(200).
If a TE link entry in the ifTable is destroyed, then so
are all of the entries in the teLinkSrlgTable that use the
ifIndex of this TE link."
INDEX { ifIndex, teLinkSrlg }
::= { teLinkSrlgTable 1 }

TeLinkSrlgEntry ::= SEQUENCE {
teLinkSrlg Unsigned32,
teLinkSrlgRowStatus RowStatus,
teLinkSrlgStorageType StorageType
}

teLinkSrlg OBJECT-TYPE
SYNTAX Unsigned32 (0..4294967295)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This identifies an SRLG supported by the TE link. An SRLG is
identified with a 32-bit number that is unique within an IGP
domain. Zero is a valid SRLG number."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { teLinkSrlgEntry 1 }

teLinkSrlgRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable is used to create, modify, and/or
delete a row in this table. No read-create object can
be modified if teLinkSrlgRowStatus is active(1)."
::= { teLinkSrlgEntry 2 }

teLinkSrlgStorageType OBJECT-TYPE
SYNTAX StorageType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The storage type for this conceptual row in the

Dubuc, et al. Standards Track [Page 27]

RFC 4220 MPLS TE Link MIB Module November 2005

teLinkSrlgTable. Conceptual rows having the value
'permanent' need not allow write-access to any
columnar object in the row."
::= { teLinkSrlgEntry 3 }

-- End of teLinkSrlgTable

-- TE Link Bandwidth Table

teLinkBandwidthTable OBJECT-TYPE
SYNTAX SEQUENCE OF TeLinkBandwidthEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table specifies the priority-based bandwidth table
for TE links."
::= { teLinkObjects 4 }

teLinkBandwidthEntry OBJECT-TYPE
SYNTAX TeLinkBandwidthEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in this table contains information about
the priority-based bandwidth of TE links. An ifEntry in the
ifTable must exist before a teLinkBandwidthEntry using the
same ifIndex is created. The ifType of ifEntry must be
teLink(200). If a TE link entry in the ifTable is destroyed,
then so are all of the entries in the teLinkBandwidthTable
that use the ifIndex of this TE link."
INDEX { ifIndex, teLinkBandwidthPriority }
::= { teLinkBandwidthTable 1 }

TeLinkBandwidthEntry ::= SEQUENCE {
teLinkBandwidthPriority TeLinkPriority,
teLinkBandwidthUnreserved TeLinkBandwidth,
teLinkBandwidthRowStatus RowStatus,
teLinkBandwidthStorageType StorageType
}

teLinkBandwidthPriority OBJECT-TYPE
SYNTAX TeLinkPriority
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This attribute specifies the priority. A value of 0 is valid
as specified in the 'Traffic Engineering (TE) Extensions to

Dubuc, et al. Standards Track [Page 28]

RFC 4220 MPLS TE Link MIB Module November 2005

OSPF Version 2' document."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203 and
Traffic Engineering (TE) Extensions to OSPF Version 2,
RFC 3630"
::= { teLinkBandwidthEntry 1 }

teLinkBandwidthUnreserved OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This attribute specifies the TE link unreserved
bandwidth at priority p. It is the sum of the unreserved
bandwidths at priority p of all component links associated
with the TE link (excluding all links that are strictly
used as protecting links)."
REFERENCE
"Link Bundling in MPLS Traffic Engineering (TE), RFC 4201"
::= { teLinkBandwidthEntry 2 }

teLinkBandwidthRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable is used to create, modify, and/or
delete a row in this table. No read-create object
can be modified when teLinkBandwidthRowStatus is active(1)."
::= { teLinkBandwidthEntry 3 }

teLinkBandwidthStorageType OBJECT-TYPE
SYNTAX StorageType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The storage type for this conceptual row in the
teLinkBandwidthTable. Conceptual rows having the value
'permanent' need not allow write-access to any
columnar object in the row."
::= { teLinkBandwidthEntry 4 }

-- End of teLinkBandwidthTable

-- Component Link Table

Dubuc, et al. Standards Track [Page 29]

RFC 4220 MPLS TE Link MIB Module November 2005

componentLinkTable OBJECT-TYPE
SYNTAX SEQUENCE OF ComponentLinkEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table specifies the component link parameters."
::= { teLinkObjects 5 }

componentLinkEntry OBJECT-TYPE
SYNTAX ComponentLinkEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in this table exists for each ifEntry that
represents a component link. An ifEntry must exist in
the ifTable before a componentLinkEntry is created with
the corresponding ifIndex. ifEntry's ifType can be
of any interface type that has been defined for TE Link
interworking. Examples include ATM, Frame Relay, Ethernet,
etc. If an entry representing a component link is destroyed
in the ifTable, then so is the corresponding entry in the
componentLinkTable. The administrative and operational
status values are controlled from the ifEntry."
INDEX { ifIndex }
::= { componentLinkTable 1 }

ComponentLinkEntry ::= SEQUENCE {
componentLinkMaxResBandwidth TeLinkBandwidth,
componentLinkPreferredProtection TeLinkProtection,
componentLinkCurrentProtection TeLinkProtection,
componentLinkRowStatus RowStatus,
componentLinkStorageType StorageType
}

componentLinkMaxResBandwidth OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the maximum reservable bandwidth on
the component link."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { componentLinkEntry 1 }

componentLinkPreferredProtection OBJECT-TYPE

Dubuc, et al. Standards Track [Page 30]

RFC 4220 MPLS TE Link MIB Module November 2005

SYNTAX TeLinkProtection
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies whether this component link is
a primary or secondary entity."
::= { componentLinkEntry 2 }

componentLinkCurrentProtection OBJECT-TYPE
SYNTAX TeLinkProtection
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This attribute specifies whether this component link is
currently used as primary or secondary link."
::= { componentLinkEntry 3 }

componentLinkRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable is used to create, modify, and/or
delete a row in this table. No read-create object
can be modified when componentLinkRowStatus is active(1)."
::= { componentLinkEntry 4 }

componentLinkStorageType OBJECT-TYPE
SYNTAX StorageType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The storage type for this conceptual row in the
componentLinkTable. Conceptual rows having the value
'permanent' need not allow write-access to any
columnar object in the row."
::= { componentLinkEntry 5 }

-- End of componentLinkTable

-- Component Link Descriptor Table

componentLinkDescriptorTable OBJECT-TYPE
SYNTAX SEQUENCE OF ComponentLinkDescriptorEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION

Dubuc, et al. Standards Track [Page 31]

RFC 4220 MPLS TE Link MIB Module November 2005

"This table specifies the interface switching capability
descriptors associated with the component links."
::= { teLinkObjects 6 }

componentLinkDescriptorEntry OBJECT-TYPE
SYNTAX ComponentLinkDescriptorEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in this table is created for every component link
descriptor. An ifEntry in the ifTable must exist before a
componentLinkDescriptorEntry using the same ifIndex is
created. ifEntry's ifType can be of any interface type that
has been defined for TE Link interworking. Examples include
ATM, Frame Relay, Ethernet, etc. If a component link entry
in the ifTable is destroyed, then so are all entries in the
componentLinkDescriptorTable that use the ifIndex of this
component link."
INDEX { ifIndex, componentLinkDescrId }
::= { componentLinkDescriptorTable 1 }

ComponentLinkDescriptorEntry ::= SEQUENCE {
componentLinkDescrId Unsigned32,
componentLinkDescrSwitchingCapability TeLinkSwitchingCapability,
componentLinkDescrEncodingType TeLinkEncodingType,
componentLinkDescrMinLspBandwidth TeLinkBandwidth,
componentLinkDescrMaxLspBandwidthPrio0 TeLinkBandwidth,
componentLinkDescrMaxLspBandwidthPrio1 TeLinkBandwidth,
componentLinkDescrMaxLspBandwidthPrio2 TeLinkBandwidth,
componentLinkDescrMaxLspBandwidthPrio3 TeLinkBandwidth,
componentLinkDescrMaxLspBandwidthPrio4 TeLinkBandwidth,
componentLinkDescrMaxLspBandwidthPrio5 TeLinkBandwidth,
componentLinkDescrMaxLspBandwidthPrio6 TeLinkBandwidth,
componentLinkDescrMaxLspBandwidthPrio7 TeLinkBandwidth,
componentLinkDescrInterfaceMtu Unsigned32,
componentLinkDescrIndication TeLinkSonetSdhIndication,
componentLinkDescrRowStatus RowStatus,
componentLinkDescrStorageType StorageType
}

componentLinkDescrId OBJECT-TYPE
SYNTAX Unsigned32 (1..4294967295)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This object specifies the link descriptor identifier."
::= { componentLinkDescriptorEntry 1 }

Dubuc, et al. Standards Track [Page 32]

RFC 4220 MPLS TE Link MIB Module November 2005

componentLinkDescrSwitchingCapability OBJECT-TYPE
SYNTAX TeLinkSwitchingCapability
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies link multiplexing capabilities of
the component link."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { componentLinkDescriptorEntry 2 }

componentLinkDescrEncodingType OBJECT-TYPE
SYNTAX TeLinkEncodingType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the component link encoding type."
REFERENCE
"Generalized Multi-Protocol Label Switching (GMPLS) Signaling
Functional Description, RFC 3471"
::= { componentLinkDescriptorEntry 3 }

componentLinkDescrMinLspBandwidth OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the minimum LSP bandwidth on
the component link."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { componentLinkDescriptorEntry 4 }

componentLinkDescrMaxLspBandwidthPrio0 OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the maximum LSP bandwidth at
priority 0 on the component link."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { componentLinkDescriptorEntry 5 }

Dubuc, et al. Standards Track [Page 33]

RFC 4220 MPLS TE Link MIB Module November 2005

componentLinkDescrMaxLspBandwidthPrio1 OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the maximum LSP bandwidth at
priority 1 on the component link."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { componentLinkDescriptorEntry 6 }

componentLinkDescrMaxLspBandwidthPrio2 OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the maximum LSP bandwidth at
priority 2 on the component link."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { componentLinkDescriptorEntry 7 }

componentLinkDescrMaxLspBandwidthPrio3 OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the maximum LSP bandwidth at
priority 3 on the component link."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { componentLinkDescriptorEntry 8 }

componentLinkDescrMaxLspBandwidthPrio4 OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the maximum LSP bandwidth at
priority 4 on the component link."
REFERENCE

Dubuc, et al. Standards Track [Page 34]

RFC 4220 MPLS TE Link MIB Module November 2005

"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { componentLinkDescriptorEntry 9 }

componentLinkDescrMaxLspBandwidthPrio5 OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "thousand bps"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the maximum LSP bandwidth at
priority 5 on the component link."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { componentLinkDescriptorEntry 10 }

componentLinkDescrMaxLspBandwidthPrio6 OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the maximum LSP bandwidth at
priority 6 on the component link."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { componentLinkDescriptorEntry 11 }

componentLinkDescrMaxLspBandwidthPrio7 OBJECT-TYPE
SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies the maximum LSP bandwidth at
priority 7 on the component link."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { componentLinkDescriptorEntry 12 }

componentLinkDescrInterfaceMtu OBJECT-TYPE
SYNTAX Unsigned32 (1..65535)
MAX-ACCESS read-create
STATUS current
DESCRIPTION

Dubuc, et al. Standards Track [Page 35]

RFC 4220 MPLS TE Link MIB Module November 2005

"This attribute specifies the interface MTU for the component
link descriptor."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { componentLinkDescriptorEntry 13 }

componentLinkDescrIndication OBJECT-TYPE
SYNTAX TeLinkSonetSdhIndication
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This attribute specifies whether this interface supports
Standard or Arbitrary SONET/SDH."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { componentLinkDescriptorEntry 14 }

componentLinkDescrRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable is used to create, modify, and/or
delete a row in this table. No read-create object
can be modified when componentLinkDescrRowStatus
is active(1)."
::= { componentLinkDescriptorEntry 15 }

componentLinkDescrStorageType OBJECT-TYPE
SYNTAX StorageType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The storage type for this conceptual row in the
componentLinkDescriptorTable. Conceptual rows
having the value 'permanent' need not allow write-access
to any columnar object in the row."
::= { componentLinkDescriptorEntry 16 }

-- End of componentLinkDescriptorTable

-- Component Link Bandwidth Table

componentLinkBandwidthTable OBJECT-TYPE
SYNTAX SEQUENCE OF ComponentLinkBandwidthEntry

Dubuc, et al. Standards Track [Page 36]

RFC 4220 MPLS TE Link MIB Module November 2005

MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table specifies the priority-based bandwidth
for component links."
::= { teLinkObjects 7 }

componentLinkBandwidthEntry OBJECT-TYPE
SYNTAX ComponentLinkBandwidthEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in this table contains information about
the priority-based bandwidth on component links.
An ifEntry in the ifTable must exist before a
componentLinkBandwidthEntry using the same ifIndex is
created. ifEntry's ifType can be of any interface type that
has been defined for TE Link interworking. Examples
include ATM, Frame Relay, Ethernet, etc. If a component link
entry in the ifTable is destroyed, then so are all entries
in the componentLinkBandwidthTable that use the ifIndex of
this component link."
INDEX { ifIndex, componentLinkBandwidthPriority }
::= { componentLinkBandwidthTable 1 }

ComponentLinkBandwidthEntry ::= SEQUENCE {
componentLinkBandwidthPriority TeLinkPriority,
componentLinkBandwidthUnreserved TeLinkBandwidth,
componentLinkBandwidthRowStatus RowStatus,
componentLinkBandwidthStorageType StorageType
}

componentLinkBandwidthPriority OBJECT-TYPE
SYNTAX TeLinkPriority
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This attribute specifies the priority. A value of 0 is valid
as specified in the 'Traffic Engineering (TE) Extensions to
OSPF Version 2' document."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203 and
Traffic Engineering (TE) Extensions to OSPF Version 2,
RFC 3630"
::= { componentLinkBandwidthEntry 1 }

componentLinkBandwidthUnreserved OBJECT-TYPE

Dubuc, et al. Standards Track [Page 37]

RFC 4220 MPLS TE Link MIB Module November 2005

SYNTAX TeLinkBandwidth
UNITS "bps"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This attribute specifies the component link unreserved
bandwidth at priority p."
REFERENCE
"OSPF Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS), RFC 4203"
::= { componentLinkBandwidthEntry 2 }

componentLinkBandwidthRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable is used to create, modify, and/or
delete a row in this table. No read-create object can
be modified when componentLinkBandwidthRowStatus is
active(1)."
::= { componentLinkBandwidthEntry 3 }

componentLinkBandwidthStorageType OBJECT-TYPE
SYNTAX StorageType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The storage type for this conceptual row in the
componentLinkBandwidthTable. Conceptual rows
having the value 'permanent' need not allow write-access
to any columnar object in the row."
::= { componentLinkBandwidthEntry 4 }

-- End of componentLinkBandwidthTable

-- Module compliance

teLinkCompliances
OBJECT IDENTIFIER ::= { teLinkConformance 1 }

teLinkGroups
OBJECT IDENTIFIER ::= { teLinkConformance 2 }

teLinkModuleFullCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION

Dubuc, et al. Standards Track [Page 38]

RFC 4220 MPLS TE Link MIB Module November 2005

"Compliance statement for agents that support read-create
so that both configuration and monitoring of TE links can
be accomplished via this MIB module."
MODULE -- this module

MANDATORY-GROUPS { teLinkGroup,
teLinkBandwidthGroup,
componentLinkBandwidthGroup }

GROUP teLinkSrlgGroup
DESCRIPTION
"This group is mandatory for GMPLS enabled devices."

GROUP teLinkPscGroup
DESCRIPTION
"This group is mandatory for devices that support the
packet switching capability."

GROUP teLinkTdmGroup
DESCRIPTION
"This group is mandatory for devices that support the TDM
switching capability."

-- teLinkTable

OBJECT teLinkAddressType
SYNTAX INTEGER { unknown(0), ipv4(1), ipv6(2) }
DESCRIPTION
"Only ipv4(1) and ipv6(2) address types need to be
supported for numbered links. For unnumbered links, the
unknown(0) address type needs to be supported."

OBJECT teLinkLocalIpAddr
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"Size of TE link IP address depends on type of TE link.
TE link IP address size is zero if the link is unnumbered,
four if the link IP address is IPv4, and sixteen if the
link IP address is IPv6."

OBJECT teLinkRemoteIpAddr
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION
"Size of TE link IP address depends on type of TE link.
TE link IP address size is zero if the link is unnumbered,
four if the link IP address is IPv4, and sixteen if the
link IP address is IPv6."

Dubuc, et al. Standards Track [Page 39]

RFC 4220 MPLS TE Link MIB Module November 2005

OBJECT teLinkRowStatus
SYNTAX RowStatus { active(1), notInService(2) }
WRITE-SYNTAX RowStatus { active(1), notInService(2),
createAndGo(4), destroy(6) }
DESCRIPTION
"Support for notReady(3) and createAndWait(5) is
not required."

-- teLinkDescriptorTable

OBJECT teLinkDescrRowStatus
SYNTAX RowStatus { active(1), notInService(2) }
WRITE-SYNTAX RowStatus { active(1), notInService(2),
createAndGo(4), destroy(6) }
DESCRIPTION
"Support for notReady(3) and createAndWait(5) is
not required."

-- teLinkSrlgTable

OBJECT teLinkSrlgRowStatus
SYNTAX RowStatus { active(1), notInService(2) }
WRITE-SYNTAX RowStatus { active(1), notInService(2),
createAndGo(4), destroy(6) }
DESCRIPTION
"Support for notReady(3) and createAndWait(5) is
not required."

-- teLinkBandwidthTable

OBJECT teLinkBandwidthRowStatus
SYNTAX RowStatus { active(1), notInService(2) }
WRITE-SYNTAX RowStatus { active(1), notInService(2),
createAndGo(4), destroy(6) }
DESCRIPTION
"Support for notReady(3) and createAndWait(5) is
not required."

-- componentLinkTable

OBJECT componentLinkRowStatus
SYNTAX RowStatus { active(1), notInService(2) }
WRITE-SYNTAX RowStatus { active(1), notInService(2),
createAndGo(4), destroy(6) }
DESCRIPTION
"Support for notReady(3) and createAndWait(5) is
not required."

Dubuc, et al. Standards Track [Page 40]

RFC 4220 MPLS TE Link MIB Module November 2005

-- componentLinkDescriptorTable

OBJECT componentLinkDescrRowStatus
SYNTAX RowStatus { active(1), notInService(2) }
WRITE-SYNTAX RowStatus { active(1), notInService(2),
createAndGo(4), destroy(6) }
DESCRIPTION
"Support for notReady(3) and createAndWait(5) is
not required."

-- componentLinkBandwidthTable

OBJECT componentLinkBandwidthRowStatus
SYNTAX RowStatus { active(1), notInService(2) }
WRITE-SYNTAX RowStatus { active(1), notInService(2),
createAndGo(4), destroy(6) }
DESCRIPTION
"Support for notReady(3) and createAndWait(5) is
not required."

::= { teLinkCompliances 1 }

teLinkModuleReadOnlyCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"Compliance statement for agents that support the
monitoring of the TE link MIB module."
MODULE -- this module

MANDATORY-GROUPS { teLinkGroup,
teLinkBandwidthGroup,
componentLinkBandwidthGroup }

GROUP teLinkSrlgGroup
DESCRIPTION
"This group is mandatory for GMPLS enabled devices."

GROUP teLinkPscGroup
DESCRIPTION
"This group is mandatory for devices that support the
packet switching capability."

GROUP teLinkTdmGroup
DESCRIPTION
"This group is mandatory for devices that support the TDM
switching capability."

-- teLinkTable

Dubuc, et al. Standards Track [Page 41]

RFC 4220 MPLS TE Link MIB Module November 2005

OBJECT teLinkAddressType
SYNTAX INTEGER { unknown(0), ipv4(1), ipv6(2) }
MIN-ACCESS read-only
DESCRIPTION
"Only ipv4(1) and ipv6(2) address types need to be
supported for numbered links. For unnumbered links, the
unknown(0) address type needs to be supported."

OBJECT teLinkLocalIpAddr
SYNTAX InetAddress (SIZE(0|4|16))
MIN-ACCESS read-only
DESCRIPTION
"Size of TE link IP address depends on type of TE link.
TE link IP address size is zero if the link is unnumbered,
four if the link IP address is IPv4, and sixteen if the
link IP address is IPv6."

OBJECT teLinkRemoteIpAddr
SYNTAX InetAddress (SIZE(0|4|16))
MIN-ACCESS read-only
DESCRIPTION
"Size of TE link IP address depends on type of TE link.
TE link IP address size is zero if the link is unnumbered,
four if the link IP address is IPv4, and sixteen if the
link IP address is IPv6."

OBJECT teLinkProtectionType
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT teLinkWorkingPriority
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT teLinkRowStatus
SYNTAX RowStatus { active(1) }
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required and active(1) is the
only status that needs to be supported."

OBJECT teLinkStorageType
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

Dubuc, et al. Standards Track [Page 42]

RFC 4220 MPLS TE Link MIB Module November 2005

-- teLinkDescriptorTable

OBJECT teLinkDescrSwitchingCapability
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT teLinkDescrEncodingType
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT teLinkDescrMinLspBandwidth
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT teLinkDescrMaxLspBandwidthPrio0
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT teLinkDescrMaxLspBandwidthPrio1
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT teLinkDescrMaxLspBandwidthPrio2
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT teLinkDescrMaxLspBandwidthPrio3
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT teLinkDescrMaxLspBandwidthPrio4
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT teLinkDescrMaxLspBandwidthPrio5
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT teLinkDescrMaxLspBandwidthPrio6

Dubuc, et al. Standards Track [Page 43]

RFC 4220 MPLS TE Link MIB Module November 2005

MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT teLinkDescrMaxLspBandwidthPrio7
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT teLinkDescrRowStatus
SYNTAX RowStatus { active(1) }
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required and active(1) is the
only status that needs to be supported."

OBJECT teLinkDescrStorageType
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

-- teLinkSrlgTable

OBJECT teLinkSrlgRowStatus
SYNTAX RowStatus { active(1) }
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required and active(1) is the
only status that needs to be supported."

OBJECT teLinkSrlgStorageType
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

-- teLinkBandwidthTable

OBJECT teLinkBandwidthRowStatus
SYNTAX RowStatus { active(1) }
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required and active(1) is the
only status that needs to be supported."

OBJECT teLinkBandwidthStorageType
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

Dubuc, et al. Standards Track [Page 44]

RFC 4220 MPLS TE Link MIB Module November 2005

-- componentLinkTable

OBJECT componentLinkMaxResBandwidth
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT componentLinkPreferredProtection
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT componentLinkRowStatus
SYNTAX RowStatus { active(1) }
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required and active(1) is the
only status that needs to be supported."

OBJECT componentLinkStorageType
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

-- componentLinkDescriptorTable

OBJECT componentLinkDescrSwitchingCapability
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT componentLinkDescrEncodingType
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT componentLinkDescrMinLspBandwidth
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT componentLinkDescrMaxLspBandwidthPrio0
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT componentLinkDescrMaxLspBandwidthPrio1
MIN-ACCESS read-only

Dubuc, et al. Standards Track [Page 45]

RFC 4220 MPLS TE Link MIB Module November 2005

DESCRIPTION
"Write access is not required."

OBJECT componentLinkDescrMaxLspBandwidthPrio2
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT componentLinkDescrMaxLspBandwidthPrio3
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT componentLinkDescrMaxLspBandwidthPrio4
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT componentLinkDescrMaxLspBandwidthPrio5
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT componentLinkDescrMaxLspBandwidthPrio6
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT componentLinkDescrMaxLspBandwidthPrio7
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT componentLinkDescrInterfaceMtu
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT componentLinkDescrIndication
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT componentLinkDescrRowStatus
SYNTAX RowStatus { active(1) }
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required and active(1) is the

Dubuc, et al. Standards Track [Page 46]

RFC 4220 MPLS TE Link MIB Module November 2005

only status that needs to be supported."

OBJECT componentLinkDescrStorageType
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

-- componentLinkBandwidthTable

OBJECT componentLinkBandwidthRowStatus
SYNTAX RowStatus { active(1) }
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required and active(1) is the
only status that needs to be supported."

OBJECT componentLinkBandwidthStorageType
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

::= { teLinkCompliances 2 }

-- Units of conformance

teLinkGroup OBJECT-GROUP
OBJECTS { teLinkAddressType,
teLinkLocalIpAddr,
teLinkRemoteIpAddr,
teLinkMetric,
teLinkProtectionType,
teLinkWorkingPriority,
teLinkResourceClass,
teLinkIncomingIfId,
teLinkOutgoingIfId,
teLinkRowStatus,
teLinkStorageType,
teLinkDescrSwitchingCapability,
teLinkDescrEncodingType,
teLinkDescrRowStatus,
teLinkDescrStorageType,
componentLinkPreferredProtection,
componentLinkCurrentProtection,
componentLinkRowStatus,
componentLinkStorageType,
componentLinkDescrSwitchingCapability,
componentLinkDescrEncodingType,
componentLinkDescrRowStatus,

Dubuc, et al. Standards Track [Page 47]

RFC 4220 MPLS TE Link MIB Module November 2005

componentLinkDescrStorageType
}

STATUS current
DESCRIPTION
"Collection of objects needed for the management of
resources associated with TE links."
::= { teLinkGroups 1 }

teLinkSrlgGroup OBJECT-GROUP
OBJECTS { teLinkSrlgRowStatus,
teLinkSrlgStorageType
}

STATUS current
DESCRIPTION
"Collection of objects needed for the management of
SRLG resources associated with TE links."
::= { teLinkGroups 2 }

teLinkBandwidthGroup OBJECT-GROUP
OBJECTS { teLinkMaximumReservableBandwidth,
teLinkDescrMaxLspBandwidthPrio0,
teLinkDescrMaxLspBandwidthPrio1,
teLinkDescrMaxLspBandwidthPrio2,
teLinkDescrMaxLspBandwidthPrio3,
teLinkDescrMaxLspBandwidthPrio4,
teLinkDescrMaxLspBandwidthPrio5,
teLinkDescrMaxLspBandwidthPrio6,
teLinkDescrMaxLspBandwidthPrio7,
teLinkBandwidthUnreserved,
teLinkBandwidthRowStatus,
teLinkBandwidthStorageType
}

STATUS current
DESCRIPTION
"Collection of objects needed for the management of
the bandwidth resources associated with TE links and
component links."
::= { teLinkGroups 3 }

componentLinkBandwidthGroup OBJECT-GROUP
OBJECTS { componentLinkMaxResBandwidth,
componentLinkDescrMaxLspBandwidthPrio0,
componentLinkDescrMaxLspBandwidthPrio1,
componentLinkDescrMaxLspBandwidthPrio2,
componentLinkDescrMaxLspBandwidthPrio3,

Dubuc, et al. Standards Track [Page 48]

RFC 4220 MPLS TE Link MIB Module November 2005

componentLinkDescrMaxLspBandwidthPrio4,
componentLinkDescrMaxLspBandwidthPrio5,
componentLinkDescrMaxLspBandwidthPrio6,
componentLinkDescrMaxLspBandwidthPrio7,
componentLinkBandwidthUnreserved,
componentLinkBandwidthRowStatus,
componentLinkBandwidthStorageType
}

STATUS current
DESCRIPTION
"Collection of objects needed for the management of the
bandwidth parameters associated with component links."
::= { teLinkGroups 4 }

teLinkPscGroup OBJECT-GROUP
OBJECTS { teLinkDescrMinLspBandwidth,
teLinkDescrInterfaceMtu,
componentLinkDescrMinLspBandwidth,
componentLinkDescrInterfaceMtu
}

STATUS current
DESCRIPTION
"Collection of objects needed for devices that are
packet switch capable."
::= { teLinkGroups 5 }

teLinkTdmGroup OBJECT-GROUP
OBJECTS { teLinkDescrMinLspBandwidth,
teLinkDescrIndication,
componentLinkDescrMinLspBandwidth,
componentLinkDescrIndication
}

STATUS current
DESCRIPTION
"Collection of objects needed for devices that are
TDM switching capable."
::= { teLinkGroups 6 }

-- End of TE-LINK-STD-MIB
END

Dubuc, et al. Standards Track [Page 49]

RFC 4220 MPLS TE Link MIB Module November 2005

10. Security Considerations

There are a number of management objects defined in this MIB module
with a MAX-ACCESS clause of read-write and/or read-create. Such
objects may be considered sensitive or vulnerable in some network
environments. The support for SET operations in a non-secure
environment without proper protection can have a negative effect on
network operations. These are the tables and objects and their
sensitivity/vulnerability:

- All the tables in this MIB module have routing information in
them, so they all have the same security attributes. Unauthorized
changes to attributes of these tables can disrupt resource
allocation in the network.

Some of the readable objects in this MIB module (i.e., objects with a
MAX-ACCESS other than not-accessible) may be considered sensitive or
vulnerable in some network environments. It is thus important to
control even GET and/or NOTIFY access to these objects and possibly
to even encrypt the values of these objects when sending them over
the network via SNMP. These are the tables and objects and their
sensitivity/vulnerability:

- IP address entries in the teLinkTable (teLinkLocalIpAddr and
teLinkRemoteIpAddr) may reveal the internals of a network provider
IP address space.

SNMP versions prior to SNMPv3 did not include adequate security.
Even if the network itself is secure (for example by using IPSec),
even then, there is no control as to who on the secure network is
allowed to access and GET/SET (read/change/create/delete) the objects
in this MIB module.

It is RECOMMENDED that implementers consider the security features as
provided by the SNMPv3 framework (see [RFC3410], section 8),
including full support for the SNMPv3 cryptographic mechanisms (for
authentication and privacy).

Further, deployment of SNMP versions prior to SNMPv3 is NOT
RECOMMENDED. Instead, it is RECOMMENDED to deploy SNMPv3 and to
enable cryptographic security. It is then a customer/operator
responsibility to ensure that the SNMP entity giving access to an
instance of this MIB module is properly configured to give access to
the objects only to those principals (users) that have legitimate
rights to indeed GET or SET (change/create/delete) them.

Dubuc, et al. Standards Track [Page 50]

RFC 4220 MPLS TE Link MIB Module November 2005

11. Contributors

Sudheer Dharanikota
EMail: [email protected]

12. Acknowledgements

The authors would like to acknowledge the contribution of Dmitry
Ryumkin.

13. IANA Considerations

The following "IANA Considerations" subsection requests IANA for a
new assignment. New assignments can only be made via Standards
Action as specified in [RFC2434].

13.1. IANA Considerations for the TE-LINK-STD-MIB

The TE-LINK-STD-MIB should be rooted under the transmission subtree.
The IANA has assigned { transmission 200 } to the TE-LINK-STD-MIB
module specified in this document.

14. References

14.1. Normative References

[IANAifType] "IANAifType MIB Module",
http://www.iana.org/assignments/ianaiftype-mib.

[IEEE] IEEE, "IEEE Standard for Binary Floating-Point
Arithmetic", Standard 754-1985, 1985 (ISBN 1-5593-7653-
8).

[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.

[RFC2434] Narten, T. and H. Alvestrand, "Guidelines for Writing an
IANA Considerations Section in RFCs", BCP 26, RFC 2434,
October 1998.

[RFC2578] McCloghrie, K., Perkins, D. and J. Schoenwaelder,
"Structure of Management Information Version 2 (SMIv2)",
STD 58, RFC 2578, April 1999.

[RFC2579] McCloghrie, K., Perkins, D. and J. Schoenwaelder,
"Textual Conventions for SMIv2", STD 58, RFC 2579, April
1999.

Dubuc, et al. Standards Track [Page 51]

RFC 4220 MPLS TE Link MIB Module November 2005

[RFC2580] McCloghrie, K., Perkins, D. and J. Schoenwaelder,
"Conformance Statements for SMIv2", STD 58, RFC 2580,
April 1999.

[RFC2863] McCloghrie, K. and F. Kastenholz, "The Interfaces Group
MIB", RFC 2863, June 2000.

[RFC3471] Berger, L., "Generalized Multi-Protocol Label Switching
(GMPLS) Signaling Functional Description", RFC 3471,
January 2003.

[RFC3630] Katz, D., Kompella, K. and D. Yeung, "Traffic
Engineering (TE) Extensions to OSPF Version 2", RFC
3630, September 2003.

[RFC4201] Kompella, K., Rekhter, Y. and L. Berger, "Link Bundling
in MPLS Traffic Engineering (TE)", RFC 4201, October
2005.

[RFC4202] Kompella, K., Ed. and Y. Rekhter, Ed., "Routing
Extensions in Support of Generalized Multi-Protocol
Label Switching (GMPLS)", RFC 4202, October 2005.

[RFC4203] Kompella, K., Ed. and Y. Rekhter, Ed., "OSPF Extensions
in Support of Generalized Multi-Protocol Label Switching
(GMPLS)", RFC 4203, October 2005.

[RFC4206] Kompella, K. and Y. Rekhter, "Label Switched Paths (LSP)
Hierarchy with Generalized Multi-Protocol Label
Switching (GMPLS) Traffic Engineering (TE)", RFC 4206,
October 2005.

[RFC4204] Lang, J., Ed., "Link Management Protocol (LMP)", RFC
4204, October 2005.

14.2. Informative References

[RFC3410] Case, J., Mundy, R., Partain, D., and B. Stewart,
"Introduction and Applicability Statements for
Internet-Standard Management Framework", RFC 3410,
December 2002.

[RFC3945] Mannie, E., "Generalized Multi-Protocol Label Switching
(GMPLS) Architecture", RFC 3945, October 2004.

Dubuc, et al. Standards Track [Page 52]

RFC 4220 MPLS TE Link MIB Module November 2005

Authors' Addresses

Martin Dubuc

EMail: [email protected]

Thomas D. Nadeau
Cisco Systems
1414 Massachusetts Ave.
Boxborough, MA 01719

Phone: +1-978-244-3051
EMail: [email protected]

Jonathan P. Lang
Sonos, Inc.
223 E. De La Guerra St.
Santa Barbara, CA 93101

EMail: [email protected]

Dubuc, et al. Standards Track [Page 53]

RFC 4220 MPLS TE Link MIB Module November 2005

Full Copyright Statement

Copyright (C) The Internet Society (2005).

This document is subject to the rights, licenses and restrictions
contained in BCP 78, and except as set forth therein, the authors
retain all their rights.

This document and the information contained herein are provided on an
"AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS
OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET
ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE
INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

Intellectual Property

The IETF takes no position regarding the validity or scope of any
Intellectual Property Rights or other rights that might be claimed to
pertain to the implementation or use of the technology described in
this document or the extent to which any license under such rights
might or might not be available; nor does it represent that it has
made any independent effort to identify any such rights. Information
on the procedures with respect to rights in RFC documents can be
found in BCP 78 and BCP 79.

Copies of IPR disclosures made to the IETF Secretariat and any
assurances of licenses to be made available, or the result of an
attempt made to obtain a general license or permission for the use of
such proprietary rights by implementers or users of this
specification can be obtained from the IETF on-line IPR repository at
http://www.ietf.org/ipr.

The IETF invites any interested party to bring to its attention any
copyrights, patents or patent applications, or other proprietary
rights that may cover technology that may be required to implement
this standard. Please address the information to the IETF at ietf-
[email protected].

Acknowledgement

Funding for the RFC Editor function is currently provided by the
Internet Society.

Dubuc, et al. Standards Track [Page 54]